MARS stations will be operating from Oct 22-26, but the participation of Amateur Radio Operators is expected on Oct 24-26.
Here is a link to the national ARRL story on it:
As part of this COMEX, MARS members will reach out to amateur radio operators (on the 24-26) for any information on real life infrastructure failures. We have been practicing this sort of reporting as part of both Western and Eastern Mass ARES nets. If there are any know local failures of infrastructure, defined as Power, Water, Medical, Sanitation, Communications or Transportation, just let the MARS operator know with information on your county name, or your zip code (which is easy to determine county name with).
MARS Operators will use non-internet connected VHF/UHF repeaters as well as 60 meter channel 1 in our area, to gather these reports.
Amateur Radio operators are asked to monitor 60-meter channel 1 (5,330.5 kHz, USB) at 0001 UTC (8:01pm ET) on October 24, for a high-power broadcast of updated information regarding this exercise and how the Amateur Radio community can participate.
Questions about this local to the Western and Eastern Mass ARRL sections can be directed towards me.
Tom Kinahan N1CPE